s19.ucoz.net has one IP number , which also has a corresponding reverse pointer. qsok.ru, o-ki.ru, 2bzy.net, knups.ru, gervi.ru and at least 100 other hosts point to the same IP. ucoz.net is a domain controlled by two nameservers at ucoz.net themselves. They are on different IP networks. Incoming mail for ucoz.net is handled by one mailserver also at ucoz.net. ucoz.net has one IP number. s19.ucoz.net is hosted on a server in United Kingdom.